/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.camera.one.v2.sharedimagereader.ticketpool;

import javax.annotation.CheckReturnValue;
import javax.annotation.Nullable;

public interface TicketProvider
{
    /**
     * Attempts to acquire and return a ticket.
     *
     * @return The acquired ticket, or null if no ticket is readily available.
     */
    @Nullable
    @CheckReturnValue
    public Ticket tryAcquire();
}
